-/*
- * Copyright (C) 2011-2013 Andre Noll <maan@systemlinux.org>
- *
- * Licensed under the GPL v2. For licencing details see COPYING.
- */
+/* Copyright (C) 2011 Andre Noll <maan@tuebingen.mpg.de>, see file COPYING. */
/** \file interactive.c Readline abstraction for interactive sessions. */
+#include "para.h"
+
#include <regex.h>
-#include <stdbool.h>
-#include <curses.h>
#include <readline/readline.h>
#include <readline/history.h>
#include <sys/ioctl.h>
-#include <assert.h>
#include <signal.h>
-#include "para.h"
#include "fd.h"
#include "buffer_tree.h"
#include "list.h"
struct i9e_client_info *ici;
FILE *stderr_stream;
int num_columns;
+ int num_key_bindings;
char empty_line[1000];
- struct task task;
+ char key_sequence[32];
+ unsigned key_sequence_length;
+ struct task *task;
struct btr_node *stdout_btrn;
bool last_write_was_status;
- bool line_handler_running;
bool input_eof;
bool caught_sigint;
bool caught_sigterm;
Keymap standard_km;
Keymap bare_km;
+ int fd_flags[2];
};
static struct i9e_private i9e_private, *i9ep = &i9e_private;
*/
int i9e_get_error(void)
{
- return i9ep->task.error;
+ return task_status(i9ep->task);
}
static bool is_prefix(const char *partial, const char *full, size_t len)
static void wipe_bottom_line(void)
{
- char x[] = " ";
- int n = i9ep->num_columns;
-
- /*
- * For reasons beyond my understanding, writing more than 68 characters
- * here causes MacOS to mess up the terminal. Writing a line of spaces
- * in smaller chunks works fine though. Weird.
- */
- fprintf(i9ep->stderr_stream, "\r");
- while (n > 0) {
- if (n >= sizeof(x)) {
- fprintf(i9ep->stderr_stream, "%s", x);
- n -= sizeof(x);
- continue;
- }
- x[n] = '\0';
- fprintf(i9ep->stderr_stream, "%s", x);
- break;
- }
- fprintf(i9ep->stderr_stream, "\r");
+ fprintf(i9ep->stderr_stream, "\r%s\r", i9ep->empty_line);
}
+#ifndef RL_FREE_KEYMAP_DECLARED
/**
* Free all storage associated with a keymap.
*
* \param keymap The keymap to deallocate.
*/
void rl_free_keymap(Keymap keymap);
+#endif
/**
* Reset the terminal and save the in-memory command line history.
if (hf)
write_history(hf);
wipe_bottom_line();
+ fcntl(i9ep->ici->fds[0], F_SETFL, i9ep->fd_flags[0]);
+ fcntl(i9ep->ici->fds[1], F_SETFL, i9ep->fd_flags[1]);
}
static void clear_bottom_line(void)
rl_redisplay();
wipe_bottom_line(); /* wipe out the prompt */
rl_insert_text(text);
+ free(text);
rl_point = point;
}
static void i9e_line_handler(char *line)
{
int ret;
+ struct btr_node *dummy;
+ if (!line) {
+ i9ep->input_eof = true;
+ return;
+ }
+ if (!*line)
+ goto free_line;
+ rl_set_prompt("");
+ dummy = btr_new_node(&(struct btr_node_description)
+ EMBRACE(.name = "dummy line handler"));
+ i9e_attach_to_stdout(dummy);
ret = i9ep->ici->line_handler(line);
if (ret < 0)
PARA_WARNING_LOG("%s\n", para_strerror(-ret));
- rl_set_prompt("");
- if (line) {
- if (!*line)
- rl_set_prompt(i9ep->ici->prompt);
- else
- add_history(line);
- free(line);
- } else {
- rl_set_prompt("");
- i9ep->input_eof = true;
- }
+ add_history(line);
+ btr_remove_node(&dummy);
+free_line:
+ free(line);
}
-static int i9e_post_select(__a_unused struct sched *s, __a_unused struct task *t)
+static int i9e_post_select(__a_unused struct sched *s, __a_unused void *context)
{
int ret;
struct i9e_client_info *ici = i9ep->ici;
ret = 0;
if (i9ep->caught_sigint)
goto rm_btrn;
- while (input_available())
+ while (input_available()) {
+ if (i9ep->stdout_btrn) {
+ unsigned len = i9ep->key_sequence_length;
+ assert(len < sizeof(i9ep->key_sequence) - 1);
+ buf = i9ep->key_sequence + len;
+ ret = read(i9ep->ici->fds[0], buf, 1);
+ if (ret < 0) {
+ ret = -ERRNO_TO_PARA_ERROR(errno);
+ goto rm_btrn;
+ }
+ ret = -E_I9E_EOF;
+ if (ret == 0)
+ goto rm_btrn;
+ buf[1] = '\0';
+ i9ep->key_sequence_length++;
+ rl_stuff_char((int)(unsigned char)*buf);
+ }
rl_callback_read_char();
+ ret = 0;
+ }
if (!i9ep->stdout_btrn)
goto out;
ret = btr_node_status(i9ep->stdout_btrn, 0, BTR_NT_LEAF);
return ret;
}
-static void i9e_pre_select(struct sched *s, __a_unused struct task *t)
+static void i9e_pre_select(struct sched *s, __a_unused void *context)
{
int ret;
i9ep->empty_line[i9ep->num_columns] = '\0';
}
-/**
- * Defined key sequences are mapped to keys starting with this offset. I.e.
- * pressing the first defined key sequence yields the key number \p KEY_OFFSET.
- */
-#define KEY_OFFSET 64
-
-static int dispatch_key(__a_unused int count, int key)
+static int dispatch_key(__a_unused int count, __a_unused int key)
{
- int ret;
+ int i, ret;
- assert(key >= KEY_OFFSET);
- ret = i9ep->ici->key_handler(key - KEY_OFFSET);
- return ret < 0? ret : 0;
+again:
+ if (i9ep->key_sequence_length == 0)
+ return 0;
+ for (i = i9ep->num_key_bindings - 1; i >= 0; i--) {
+ if (strcmp(i9ep->key_sequence, i9ep->ici->bound_keyseqs[i]))
+ continue;
+ i9ep->key_sequence[0] = '\0';
+ i9ep->key_sequence_length = 0;
+ ret = i9ep->ici->key_handler(i);
+ return ret < 0? ret : 0;
+ }
+ PARA_WARNING_LOG("ignoring key %d\n", i9ep->key_sequence[0]);
+ /*
+ * We received an undefined key sequence. Throw away the first byte,
+ * and try to parse the remainder.
+ */
+ memmove(i9ep->key_sequence, i9ep->key_sequence + 1,
+ i9ep->key_sequence_length); /* move also terminating zero byte */
+ i9ep->key_sequence_length--;
+ goto again;
}
/**
* The caller must allocate and initialize the structure \a ici points to.
*
* \return Standard.
- * \sa \ref register_task().
*/
int i9e_open(struct i9e_client_info *ici, struct sched *s)
{
int ret;
+ memset(i9ep, 0, sizeof(struct i9e_private));
if (!isatty(ici->fds[0]))
return -E_I9E_SETUPTERM;
+ ret = fcntl(ici->fds[0], F_GETFL);
+ if (ret < 0)
+ return -E_I9E_SETUPTERM;
+ i9ep->fd_flags[0] = ret;
+ ret = fcntl(ici->fds[1], F_GETFL);
+ if (ret < 0)
+ return -E_I9E_SETUPTERM;
+ i9ep->fd_flags[1] = ret;
ret = mark_fd_nonblocking(ici->fds[0]);
if (ret < 0)
return ret;
ret = mark_fd_nonblocking(ici->fds[1]);
if (ret < 0)
return ret;
- i9ep->task.pre_select = i9e_pre_select;
- i9ep->task.new_post_select = i9e_post_select;
- sprintf(i9ep->task.status, "i9e");
- register_task(s, &i9ep->task);
+ i9ep->task = task_register(&(struct task_info) {
+ .name = "i9e",
+ .pre_select = i9e_pre_select,
+ .post_select = i9e_post_select,
+ .context = i9ep,
+ }, s);
+
rl_readline_name = "para_i9e";
rl_basic_word_break_characters = " ";
rl_attempted_completion_function = i9e_completer;
if (ici->bound_keyseqs) {
char *seq;
int i;
- /* FIXME: This is an arbitrary constant. */
- for (i = 0; i < 32 && (seq = ici->bound_keyseqs[i]); i++) {
- char buf[2] = {KEY_OFFSET + i, '\0'};
- /* readline needs an allocated buffer for the macro */
- rl_generic_bind(ISMACR, seq, para_strdup(buf), i9ep->bare_km);
- rl_bind_key_in_map(KEY_OFFSET + i, dispatch_key, i9ep->bare_km);
+ /* bind each key sequence to our dispatcher */
+ for (i = 0; (seq = ici->bound_keyseqs[i]); i++) {
+ if (strlen(seq) >= sizeof(i9ep->key_sequence) - 1) {
+ PARA_WARNING_LOG("ignoring overlong key %s\n",
+ seq);
+ continue;
+ }
+ if (rl_bind_keyseq_in_map(seq,
+ dispatch_key, i9ep->bare_km) != 0)
+ PARA_WARNING_LOG("could not bind #%d: %s\n", i, seq);
}
+ i9ep->num_key_bindings = i;
}
if (ici->history_file)
read_history(ici->history_file);
if (ici->producer) {
rl_callback_handler_install("", i9e_line_handler);
i9e_attach_to_stdout(ici->producer);
- rl_set_keymap(i9ep->bare_km);
} else
rl_callback_handler_install(i9ep->ici->prompt, i9e_line_handler);
return 1;
* Tell i9e that the caller received a signal.
*
* \param sig_num The number of the signal received.
- *
- * Currently the function only cares about \p SIGINT, but this may change.
*/
void i9e_signal_dispatch(int sig_num)
{
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